A system for thoroughly spraying buildings with a pesticide. A truck carries a tank of liquid pesticide, a hose on a reel and a pump for pumping pesticide into the hose. A cart including a tube having a first end for connection to the hose and a second end carrying one or more spray heads is placed at the far end of a building with the hose extending the length of the building and out a door to the truck. The tube is mounted on at least two wheels, with a sled member supporting the end of the tube adjacent to the hose connection. The spray heads produce a pattern in approximately a vertical plane perpendicular to the length of the tube and hose. As the hose is reeled up, the cart is pulled across the floor of the building, with the fan-like spray pattern fully treating the building interior.

A method of optimizing the delivery of water to cultivated fields by means of a pivoting irrigation gun mounted on a moving carriage, the method consisting, for irrigating a field of length (L) and of width equal to twice the throw (P) of the gun: in subdividing the irrigation zone into three successive zones, namely: a start-of-irrigation zone (Z.sub.D), an intermediate zone (Z.sub.I), and an end-of-irrigation zone (Z.sub.F); and in irrigating the start-of-irrigation zone (Z.sub.D) and/or the end-of-irrigation zone (Z.sub.F) by performing at least one alternation of a pause during which the carriage is stationary and a displacement of the carriage at a predetermined speed over a distance corresponding to one throw of the gun, so as to optimize the delivery of water relative to the delivery supplied in the intermediate zone, by limiting the water deficits (d.sub.1, d.sub.2) at the beginning and at the end of irrigation.

A system for monitoring the wind speed experienced at a particular residential location includes a roof housing with a cup-type anemometer having three or four concave cups attached to a rotatable vertical shaft. The cups resist the wind, causing the cups and shaft to rotate at a rate proportional to the wind speed. Shaft is rotatably joined to a dynamo which converts the mechanical energy derived from rotation of the shaft into electricity. Voltage from the dynamo is then transferred to rechargeable batteries which power the system. An array of solar panels is also utilized to recharge the batteries. The shaft includes a mark detectable by a photomicrosensor through which the shaft extends, allowing the photomicrosensor to count the number of shaft revolutions. This data is sent at fixed time intervals to a logic circuit housed within a display unit. The logic circuit calculates wind speed according to the number of shaft revolutions detected within a fixed time interval. An LED on the display unit corresponding to an appropriate Beufort Scale wind classification is then activated and the wind speed is digitally displayed. An audible alarm within the display unit is activated if the wind speed exceeds a predetermined speed.

The invention relates to an irrigation system particularly for plant cultures comprising an irrigation arm which can be pivoted in a horizontal angle region around an essentially vertical axis, a water jet exiting from the front thereof. According to the invention, an electronic control device (10) controls the horizontal angle region (.alpha.) which is covered by the irrigation arm (6), the control device (10) contains an electronic memory (23), wherein the values of two or more horizontal angle regions can be digitally stored, and a programmable run-off control element (22) wherein a sequence of stored horizontal angle regions can be established. The stored horizontal angle regions can be established by means of a GPS receiver.